Process of forming filled mountings



G, H. DAY.. PROCESS OF FORMING FILLED MOUN TINGS.

1,345, 143. FIGI APPLICATION FILED DEC. I3, 1916.

Patented June 29, 1920. Flam FIGZV FIG. V

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a m MI W m e M m 2 Q4 I M UNITED STATES PATENT. OFFICE.

'cnone'nn. DAY, or son'r'nnnrncn, MASSACHUSETTS, Assrenon TO AMERICAN OPTICAL, COMPANY, or son'rnnmncn, MASSACHUSETTS, A VOLUNTARY ASSOCIATION OF MASSACHUSETTS.

PROCESS OF FORMING FILLED MOUNTINGS.

Specification of Letters Patent. Patented June 29, 1920.

Application filed December 13, 1916. Serial No. 136,697.

To all whom it may concern:

Be it known that I, GEORGE I-I. DAY, a citizen of the United States, residing at Southbridge, in the county ofWorcester and State of Massachusetts, have invented certain new and useful Improvements in Processes of Forming Filled Mountings, of which the following is a specification.

My invention relates to an improved process of forming ophthalmic mountings or the stock therefor, and has particular reference to stock being formed of filled material having a reinforced or heavier portion on one side than the other.

One of the leading objects of the present invention is the provision of an improved process of forming stock for use in the construction of ophthalmic mountings or the like,'which will permit of'said stock being formed of filled material having a reinforced or heavier portion on one side than the other whereby said heavier portion may be disposed to receive the greater wear to render the general durability of the entire construction substantially uniform.

A further objectof the present invention is the provision of an improved process which will prevent twisting of the material or the like and will thus enable the operator or user thereof toreadily determine the exact location of the reinforced portion of the coating of the stock throughout the entire length of the stock.

Other objects and advantages of my improved process should be readily apparent by reference to the following specification taken in connection with the accompanying drawings, and it will be understood that I may make any modifications in the specific details of construction shown and described within the scope of the appended claims without departing from or exceeding the spirit of my invention.

Figure I represents a perspective view of the core used in my process.

Fig. II represents a view of the seamless shell adapted for mounting on the core. Fig. III represents a sectional viewof the disk from which the shell is formed.

metal.

Fig. VI represents a similar view of a sli htly modified shape. ig. VII represents a similar View of another form.

Fig. VIII represents a side view of a simple form of mechanism for carrying out a part of m process. V

Fig. I represents an end view thereof.

Fig. X represents a view of the apparatus for forming the completed article.

Fig. 'XI represents a view of a machine for formin another style of article.

Fig. XI represents a sectional Viewof a tubular wire embodying my improvement.

Fig. XIII represents a sectional view of a spectacle bridge embodying my improvement'.

In the drawings, in which similar characters of reference are employed to denote corresponding parts throughout the several views, the numeral 1 designates the core of my improved stock, preferably formed from a suitable composition material having secured thereon as by the solder 2, the seamless incasing shell 3, preferably'of precious In the carrying out of my invention it is desirable that the ductility or malleability of the core and shell be substantially the same so that as the parts are reduced by drawing, rolling or the like, there will be a corresponding or equal reduction or decreasing of the diameter of the core and the thicknesses of the incasing shell, the purpose to be accomplished here being the maintenance of a substantially constant ratio between the core 1 and the several thicknesses of the shell 3, irrespective of whether the parts are in their original large form as at first united, or whether they have been made into a quite small wire.

line, the incasing shell 3 has its inner and outer walls eccentrically' disposed whereby the outer wall is relatively thin at one side and relatively thick at the opposite side, preferably tapering gradually from thickest to thinnest point circumferentially of the core, the result accomplished being that the core is pnotected on one side by a relatively thick pieoeof material so thatthe points of wear will be reinforced, as illustrated in X and XIII for example, particular 7 attention being called to the points 4 and 5 in Fig. XIII. From these it will be noted that when the stock is formed into a spectacle bridge the reinforced portion may be disposed over the bends 4; and on the nose engaging portion 5 to place a thicker coating over the core at these points where the wear against the face comes than is at the outer side, which is not subjected to much wear and serves merely to cover the base metal core and preserve the appearance of the mounting. By having the continuous heavy coating on the wearing side, the mounting as a whole should last much longer than when a uniform coating is employed, while at the same time the parts may be constructed from stock wire or the like and merely shaped into form by either rolling, as indicated in Fig. X, the desired shape be ing imparted to the piece of stock by the rollers 6 and 7 or by swaging or the like as between the dies 9 illustrated in Fig. XI.

In the preparation of the stock according to my improved process, I suitably form-the shell so that itwill have the relation described to the core, that is, thicker on one side of the core than on the other, this being accomplished in any manner, as for example the manners' illustrated in Figs. III

and IV, in which I have made use of an original flat blank thicker at one edge than 5 the other, so that when pressed into an initial cup to receive the core 1 it will have the appearance shown in Fig. IV, this being an extremely simple and desirable-method of properly shaping the shell 3, although it will be understood that if preferred I may form a uniform precious metal shell and mount it eccentrically and turn it down to a desired relative thickness at diametrically opposite points, may mold it or pressit in any other desired manner.

ikewise, it will be understood that while in Fig. III have shown the shell as of tubular form to fit a cylindrical core, if preferred the core and shell may originally have either an oval formation in cross section,'as shown in Fig. VI, or a rectangular formation, as shown in Fig. VII, or if preferred the parts shown in'Fig.'V for instance when secured together may be initially rolled or shaped to produce theforms shown in Figs.

VI and VII.

. To those conversant with the art of working material of this nature the purpose of this irregular configuration should be readily apparent, since it will be understood that to efliciently make use of my improved process it is desirable to keep track of the exact location on the stock of the heaviest portion of the shell, and it is in the facilitation of the accomplishment of this result that I make use of the forms shownin Figs.

VI'and VII. The stock'being in these forms itis passed between the rollers 6 and 7 which serve to roll down and reduce the stock in the usual and well known manner, wh1le if desired to prevent any tendency toward twisting and hold the stock straight while going through the rollers, I may make use of the guides llof shape to fit the oval rectangular or othershaped stock and guide ,7

it at one or both sides of the rollers to securely hold it against twisting movement. From the foregoing description taken in Q connection with the accompanying drawtwo parts being as'nearly as possible the same so that there will be a corresponding decrease in their size to maintain a constant ratio between the parts, that I thensuitably reduce the bar as by rolling, forming it if desired into angular or' prolate cross sectional form to make twisting easily'*recog nizable, and, provide guides engaging said forming toprevent such twisting, if desired, and it will be further understood that I subsequently suitablyv shape the stock, out the same from the wire, and apply it to an ophthalmic mounting or the like as desired.

I claim:

1. The process of forming filled stock for ophthalmic mountings or the, like, consist,-

ing in mounting on a core a shell thicker on one side of the core than on the other, shaping the parts into' non-circular form, holding the parts against twisting and reducing the parts while so held to produce a finished article having a thickened or reinforced portion of the shell continuous along the length thereof on one side and located in constant I relation whereby the shell is thicker'on one side of the core than the other, suitably elongating the bar thus formed to increase its length and decrease its diameter to desired size, deforming the shape of the bar during the reducing operation, and holdingthe deformed bar against twisting to maintain'the thicker portion of the shell in uniform position with respect'to the deformation of the bar. V V 3. The process of forming a laterally're .inforced filled stock consisting in securing i on a core an incasing shell of. irregular thickness, uniformly reducing the parts and holding the same against twisting movement so that they will be retained in aconstant relative position of the thick and thin portions of the shell.

&. The processof forming a wire for a spectacle bridge or the like, consisting in forming a base metal core, forming a precious metal shell with its inner and outer faces eccentric to provide a thicker portion of precious metal at one side than the other, and suitably uniting and reducing the shell and the core to produce a filled wire having thicker portions of precious metal coating on one than on the other side of the core, and holding the parts against twisting movement, substantially as and for the purpose set forth.

5. The process of forming filled stock for ophthalmic mountings or the like, consisting in forming an ingot or bar having the core and shell portions eccentrically located to produce a thicker portion of the shell on one side of the core than the other, uniformly reducing the core and shell to desired size, and holding the parts against twisting movement to maintain a constant relative posifion of the thick and thin portions of the shel 6. The process of forming a spectacle bridge or the like, consisting in shaping a base metal core, shaping, a seamless precious metal shell into a cylinder having a central bore to receive the core and having its wall thicker at one side than at the other, uniting the core and shell, reducing the core and shell to a Wire of desired diameter, cutting a blank from the Wire, and bending the blank in such manner as to bring the thickened or reinforced portion of the shell on the inner side of thecompleted bridge.

In testimony whereof I affix my signature in the presence of two witnesses.

' GEORGE H. DAY.

Witnesses:

Enrrn M. HALVORSEN, J L JOSEPH MACCARTHY. 

